Process of making metallic composition



UNITED STATES PATENT OFFICE.

ELIVALETH JOSEPH ROLLINGS, OF MOBILE, ALABAMA, ASSIGNOR TO ABRAM B. PETERSON, OF CHICAGO, ILLINOIS.

PROCESS OF MAKING METALLIC COMPOSITION.

SPECIFICATION forming part of Letters Patent No. 449,783, dated April '7, 1891.

Application filed June 21, 1890. Serial No. 356,279. (Specimeim) To all whom it may concern.-

Be it known that I, ELIVALETH JosEPH RoLLINGs, a citizen of the United States, re-

siding at Mobile, in the county of Mobile and State of Alabama, have invented a new and useful Process of Making Metallic Compositions to be Used for Lining Journal-Boxes, which invention relates to a mixture of plumbago and fluxes with certain metals in such t proportions and in such manner as to form a composition hard and durable and yet of an oily or lubricating nature, of which the following is a specification.

Heretofore the proposed addition of plumbago to anti-friction metals has been somewhat difficult, as the plumbago must be in a fine state of division, and it is with great difficulty that it can be co m mingled with the other heavier ingredients of the charge. By the combination of the plumbago with alum and charcoal I find that the plumbago is readily and completely combined with the molten metals without much stirring, and by this operation a new and useful result is effected.

In my improved way of making anti-trio tion metals I depend for novelty on the proportions of the several ingredients employed and the particular way of mixing the same, as more fully described.

0. It is proposed to apply this process to any form of metal or alloy, but more especially to well-known anti-friction alloys, substantially of the composition herein described; but I do not wish to restrict the application of the process to any particular metal or alloy. As an example in carrying out the invention the following substances are taken in the proportions of: lead, sixty-one pounds; antimony, thirty-two pounds; block tin, seven pounds;

copper, one pound; plumbago, one pound;

pulverized charcoal, one-fourth pound; powdered alum, one-fourth pound. These last three ingredients should be finelypulverized and thoroughly mixed before use. The lead should be melted in a deep and narrow crucible well heated by either a coal or a coke fire, and when molten I add the antimony, then the copper and tin. Finallylseparately pulverize and thoroughly mix the charcoal,

alum, and plumbago before adding to the metals in the crucible. One-fourth the entire quantity of the powder should be stirred before the next portion is added. After the entire portion of the powder is added the charge should then be poured from the crucible into molds of convenient size. During the casting or pouring of the metal the charge should be continually stirred, and as a further precaution it is desirable that the molds should be well warmed before the composition is poured into them. I find that in the melting of the ingredients in proportions above named there will be a loss of about two and one-half pounds in weight, the charge being proportioned as described for the production of an even hundred-weight of metal.

IVhat I claim, and desire to secure by Letters Patent of the United States, is as follows:

The process of making anti-friction alloys, which consists in melting the metallic constituents of the charge and then combining therewith a powdered mixture of plumbago, alum, and charcoal, substantially as and for the purpose described.

Dated June 17, A. D. 1890.

ELIVALETH JOSEPH ROLLINGS.

Attest:

FRANK WILLIS BARNETT, R. 11. THOMAS. 

